Battery module with liquid cooling device and battery box

Abstract

The invention discloses a battery module with a liquid cooling device and a battery box. The battery module comprises a shell, a plurality of battery cells and the liquid cooling device, the pluralityof battery cells are sequentially and transversely arranged in the shell, and the liquid cooling device comprises a liquid inlet pipeline, a liquid return pipeline and a plurality of liquid cooling plates which are arranged on the shell. A main liquid inlet flow channel is arranged in each liquid cooling plate, and the inner diameter of the main liquid inlet flow channel is gradually increased from a main liquid inlet to a backflow connecting part. Compared with the prior art, the battery module with the liquid cooling device provided by the invention has the advantages that firstly, the inner diameter of the main liquid inlet flow channel of the liquid cooling plate is gradually increased from the main liquid inlet to the backflow connecting part, so that each cooling flow channel can realize the very good liquid flow circulation when being connected with the main liquid inlet flow channel; the liquid cooling plates are tightly attached to the battery cells, so that the uniform heatdissipation of each part of the battery cells is ensured, the temperature consistency of the battery cells is good, the reliability of the battery cells in use is improved, and the service lives of the battery cells are prolonged.

Description

technical field [0001] The invention relates to a battery module, in particular to a battery module with a liquid cooling device and a battery box using the battery module. Background technique [0002] The battery module can be understood as the intermediate product of the battery cell and the pack formed after the combination of lithium-ion cells in series and parallel, and the addition of a single battery monitoring and management device. Its structure must support, fix and protect the battery, which can be summarized into three major items: mechanical strength, electrical performance, thermal performance and fault handling ability. Whether the position of the battery cell can be well fixed and protected from deformation that damages its performance, whether it can avoid the spread of thermal runaway, etc., will be the criteria for judging the quality of the battery module. [0003] The temperature environment in the battery pack has a great impact on the reliability, li...

AI Technical Summary

Problems solved by technology

The existing cooling plate is generally provided with a liquid inlet channel, a plurality of cooling branches connected to the liquid inlet channel, and a liquid return channel connected with the plurality of cooling branches, but in the cooling branch channel far from the inlet of the liquid inlet channel The circulation efficiency of the cooling liquid is low, which reduces the heat dissipation efficiency of the cooling plate, resulting in poor heat dissipation of the battery cell

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